OK, help me out here guys. I went to an Autozoned earlier today and bought what their book says is the correct Bosch oil filter, a p.n. 3332. Well, I thought it looked way too small so I also looked up the Mobil 1 filter. It said to use part number whatever(MOT-1-I think) and when I opened it was a similar size-about 3 inches tall and 3 inches across. So I then take the Bosch up to the counter and have the parts monkey double check-yep, the book and the computer says it's the right one. Was in a hurry when leaving so I didn't crawl underneath to see what was already on it(big mistake). Get home and after a couple hours decide to start changing oil. Truck is a '04 K1500 Silverado Z-71 5.3 ltr. V8(I'm the one posted about oil & filters) and yep, you guesed it-has an AC PF-59 on it now. WTH? Looks to be twice as tall and so now I'm totally bumfuzzled. I thought it looked strange as I'm used to my '91 C-1500 350 with the humongous(in comparison) filter.
So who is wrong-the Quikilube who changed it last time and used the AC PF-59 (Pop still had it then) or the Autozoned which says to use this itty-bitty filter? This little Bosch looks like what I use on my Troybilt lawntractor w/14 horse Kohler-ain't no way this'll work on a 5.3 liter V8, right? Or not?
A little help please and it'll be greatly appreciated. Thanks, Snuffy P.S. have read that the Bosch and AC are identical internally